git: 9front

ref: 6996fffa45a4e13e65394e8c46a6937c1ac3b8e7
dir: /sys/src/cmd/troff/

FIXES
README
cvt
dwbinit.c
dwbinit.h
ext.h
find
fns.h
hytab.c
mbwc.c
mkfile
n1.c
n10.c
n2.c
n3.c
n4.c
n5.c
n6.c
n7.c
n8.c
n9.c
ni.c
popen.c
space.c
suftab.c
system.c
t10.c
t11.c
t6.c
tdef.h
unansi